Muffler



May 31, 1932. E. P. GRAY 1,860,892

MUFFLER Filed April 1l. 1929 IN VEN TOR.

M @wy/ Patented my 31, 1932 `iINi'i-ED) sr-A'ras PATENT OFFICE.

EMIT GRAY, I'v ETOIT, MICHIGAN MUFFLER Animation ma .1pm 11,

y valve housing through which gasy may pass into a .common discharge nozzle, both when valve is closed and open; third, toprovide a two way muiller having means .for whirling the gases in one of its ways 4to unite with the as flowing through the other of its ways;

ourth, to provide a muiiler having-louvered members located around a central chamber; fifth, to provide a muiller with means for cooling the ases flowing therethrough by acceleratlng tleir Vcontact with the cooler outside walls of said mulr; and sixth, to provide a muler having means for straightening the whirlin flow of gases therethrough.

attain these objects by the mechanism illustrated in the accompanying drawings, 1n

v Which- Fig. 1 is a vertical section of the muler; Fig. 2, a plan view of the mutller Fig. 3, an end view of the yvalve housing; Fig. 4, a side view of the valve housing; Fig. 5, a sectional view ofthe valve housing on the line 5 5, Fig. 3; Fi 6, an end view of a louver member; Fig. a sectional .view of the. louver member on the line 7--7, Fig. 6; Fig. 8, a

'frontvview of the valve member; Fig. 9, a side view of the valve member; Fig. 10, an

end view of the valve member in its closed osition; Fig. 11, an enlar ed view of the lbuvers in the louvered mem r; and Fig. 12, a sectional view of the louvered member on the line 12-12, Fi .6@

Similar' numera s refer to similar parts throughout the several views.

The housing 1 is provided with the shoulder 2 over which lits the outer shell 3 of the muilleru The housing 1 is provided with a threaded boss 4 into which isi'threaded the screw 5 for fastening the shell in position on the housing 1, the screw 5 passing through a hole in the shell 3. A plurality of screws 5 and bosses 4 may be used if desired. The valve 5 is mounted in the passage 6 of the housing 1, the valve'5 being made of the `plates as at 21.

1929. serial' No. 354,232.

proper diameter to eii'ectively close the passage 6 when moved to an angular position of approximately 20 degrees from its right angle n position to the walls of the passage 6; as shown in Fig.l 10. This always insures the valve 5 being moved 'to an eifective closed position without the danger of the valve 5 being moved entirely through' and beyond its right angle position to the walls of the pasasge 6.

The valve 5 is also provided with the bosses 7 and the shafts 8 and 9 are secured in the bosses 7 by means of the pins 10. The pin 9 is supported in its bearing in the boss 4. The pin 8 is supported in its bearing in the boss 11 of the housing 1 and also in the gland bushing 12 which is threaded into the boss 11 of the vhousing 1, the bushing 12 being utilized to compress the packing material 13, thus maintaining a tight joint about the shaft 8 and preventing the escape of gases around same. l

The valve y5 may be constructed if desired, with the extending rib 14 for :facilitatingv the holding of saidvalve when being machined. The bushing 12 is also used for locking the outer shell 3 to the housing 1, the bushing 12 passing through a hole in the outer shell 3. Also. the bushing 12 compresses the gasket 15 against thel shell 3, thus effectively preventing the escape of gases through the outer shell 3.

The inner shell or tube 16 is supported, at

its rear end, in the housing l and throughout its remaining length by the baille plates 17, 18, and 19, which are provided with openings, apertures, or louvers 20. The louvers in the plates 17, 18, and 19 are formed by partially punching out a portion of the wall metal of the plates, leaving said portion sloping outwardl from the wall of the 4 t is to be especially noted that the sloping portion 21 adjacent the openings 20 is so arranged that the gases or fluids passingI through said openings will bey givenk a whirling or rotating motion.

The batlleplates 17, 18, andl 19 are each provided with a flanged shoulder 22 for attaching to and supporting the outer shell 3 and a flanged shoulder 23 for attaching to and supporting the shellor tube 16.

The front head 24 of the mufller is` proi vided with a flanged shoulder 25 for lattaching to and sup orting the outer shel13v l by dottedlines) ywhich is connected with the vides Venturi means for increasing 4Asis en ine to be operated with the mufller.

he housing 1 is provided with a series of holes or opemngs 29 lying between the outer -shell 3 and the valve portion of the housing 1. The holes 29 are tapered with .their larger areas toward the front or inlet end of the muiler. Also the openings 29 may be of the desired shape and size to properly receive the gases or fluids flowing through them from the inlet pipe 2,8.

The inner shell or tube 16 may be provided with a series of holes 30 connecting with the chamber 31 lying between the front head 24 and the forward end of the tube 16. The inner shell or tube'16 may be further provided with aseries of holes 32connecting with the chamber 33 lying between the plate 17 and the plate 18.V

`The inner shell vor tube 16 may be further provided with a series of holes 34 connecting with the chamber 35 lying between the plate 18 and the plate 19. The inner shell or'tube 16 may be further providedl with a series of holes 36 connecting with the chamber 37 lying between the yplate 19 and the housing 1. 'l

Itis tobe noted that the positions of the plates 17, 18, and 19 may be'varied'or spaced as to the best proportion and number to de-v termine the flow of the gases or fluids to or from the chambers 31, 33, 35 .and 37, the tube 16, and the housing 1. `The `housing 1 is also provided with a collector portion 38 which tends to close the end of the chamber 39 formed by the tube 16 and the passage 6 of the housing 1, the discharge end 40 of the collector portion being of smaller area than the chamber 39. The collector portion 38 of the housing 1 is formed so that it prothe speed of the gases or fluids 4flowing out o the lchamber 39.

It is to be noted that the series of holes or l openings 29 in the housing 1 maybe formed with a louver portion if it is desired to con-y tinuev the whirling or rotating of the gases or fluids beyond the valve housing. Also the housing 1 may be used with the holes asl 3 thus allowing the discharge end 40 of the or tube 3 may be ofthe desired length'to permit the member' 41 to be placed at the rear l of the shell 3, the member 41 being provided with a flanged shoulder 42 for attaching to and sup ortin the shell 3. The member 41 may be orme with an extendin .portion 43 which in turn may receive the ischarge or tail piepe 44, as shown by dotted lines. 4The mem r 45 may be placed between the housing 1 and the member 41 and is provided with a an ed shoulder 46 and an extendin portion 4 to receiveand support the tu e 48, the tube 48 bein placed in line with the. dis

mharge end 40 o the housing 1 and the discharge or tail ipe 44.

The controlllever 49 is connected b a wire, cable, or rod 50, with the means use by the operator of a motor vehicle, for the control of the fuel throttle of the carburetor of the engine. This is preferably connected with the foot accelerator controlling the fuel throttle, although, if desired, the control lever 49 may be connected with the manual throttle control for the en ine.

y It is to be noted that t e control lever 49 lis shown, in Fig. 2 out of' rojection with Fig. '1, the operating cable 50 ere extending parallel with the muffler. However, it is to be understood that the control lever 49 may be located in'the mostk convenient position for extending the operating cable 50 or its equivalent wire or rod, to connect with the mechanism operated, by the driverof a motor vehicle, for controlling the throttle inthe intake passageof the carburetor of the engine with which the mufller is used. In operation, the gases enter the forward chamber 31 through the inlet i e 28 and the tube 27. If the valve' 5 is fiill) or nearly closed the gases will tend to fill the entire mulller quickly, practically'with the first o eration of the engine. The gases will over ow outwardly through the series of holes 30, 32, 34, and36 intov the chambers 31,33, 35, and 37. As the gases quickl fill the chamber 39 when the valve 5 is fu ly or nearly closed, in a set osition corresponding to a'slow oran idling speed of the engine, the gases will tend to fill the chamber 31, passing through the o n space between the ends of the tubes 16 an 27 and theseries of holes 30. It is to be here noted that the tube 16 may be extended to connect or 'unite with the tube 26, if desired,

the series of holes 30 being increased in numthe chamber 33, the gases leaving the openings 20 with a whirling or 'rotating motion, due to their being thus deflected by the sloping' portions 21 of the plate 17. In chamber 33, the gases will be united with the gases which have expanded or passed outwardly from the chamber 39 through the series of l holes 32; The united gases in the chamber 33 s ,will -be further given whirling impetus by passing through the openings 1n plate 18 to the chamber 35, where they will be further joined and united with 'the gases which have expanded or passed outwardly from the chamber 39 through the series of holes 34.

The united gases in the chamber will be I' given still further whirling impetus by passthrough the openings 29 in the housing 1, as

shown,`the gases are causedto straighten out from their whirlin path and are caused to .flow onwardly to t e tail pipe 44 without' a pronounced whirling or rotating motion. However if it is desired to contlnue the whirlin motion of the gases be ond the. housing 1,

this may be accomplishe by providing the openings 29, in the housing 1, with louvers.

It is to be especially noted that in In invention, the gases may pass through the oles 29 in the housing 1 both when the valve 5v is wholly closed and when'the valve 5 is wholly or partially o en. When the engine with which the-mu er is connected, is accelerated in speed, with its consequent greater displacement lof exhaustl gases, the valve 5 will e automatically opened, by means of the op-L eratin member 50 connected with the engine thrott e control means, operated bythe driver of the motor vehicle, with the result that the gases may enter the inner shell or tube .16 l and pass at high velocity directly through the chamber 39,'the passage 6, and out of the discharge end 40 of the `housing 1 and thus out through the tube 48 and the tail pipe 44.

My invention thus provides a muilier having an increasedeiliciency of gas iiow together with a valve which opens and closes automatically to the proper degree to maintain an equalized' pressure in the muiiller.

It is to be further'noted that the gases passd ing through theI chamber 39, when the valve 5 is whol y or partially opened, will be increased in speed as it emerges from the discharge end 40 of the housing 1. This in- Icreasedspeed of the gases will tend to cause the slower moving gases passing through the openings 29, in housing'l, to be united or pulled with'the faster moving gases emerg; ing from the discharge end 40, thus accelerating the I evacuation or ejection of gases from the outer chambers 31, 33, 35, and 37. When the valve 5 is in a partially closed positiori sothat the ilow4 ofgases is retarded therethrough, the gases passing through the openings 29,.in the housing 1, into the chamber 51 will be accelerated in speed as they further pass through thet-ube 48. This increase of the speed ofthe gases through the tube 48 will in turn cause the slower moving gases l passing through the artially opened valve 5 to be unlted or pulle with the faster moving gases from the chamber 39.

The member v45 may also, if desired, be provided with openings similar to those of the housing 1 and the plates 17, 1-8, and 19.

It is also to be especially noted that, in my invention, the gases passing v through the plates 17, 18, and 19 will be whirled or rotated and their centrifugal motion will carry them against the inner surface of the outer diameter of the shell 3, thus providing a cushion of gas which will wipe the inner surface of the outer wall and1 provide more eiiicient cooling of the gases, the/heat being more efficiently dissipated throughiy the walls of the shell 3 to the cooler air on the outside of the shell 3.

I claim:

1. In a muffler, the combination of ahollow member having an inlet end, a housing in said hollow member, said housing being located at the end opposite to the inlet end of said hollow member, said housing being provided with a discharge nozzle, a valve in said housing, said valve being placed in alignment with the inlet of said hollow member fand the discharge nozzle of said housing, a single tubular member extending forwardly from said housing to a point adjacent butunconnected -gases emerging through the tube 48, thus ac- 'celeratlng thev evacuation or ejection of the with the inlet end of said hollow member, l

and a plurality of inde endently located wall members, each of sai wall members being continuous throughout their eripheral length, eachof said wall members being provided with means to cause gases to pass therethrough with a whirling motion.

2. ln a muiller, the combinationof a continuous tubular member, a perforated member located within said continuous tubular member so as to form a space therebetween, a housing member secured to said continuous tubular member, said housin member being provided with ports communicating with the space between said continuous tubular member and said perforated member, said housing member being further provided with a port communicating with said perforated member, means for imparting a whirling motion to the-gases or fluids in the space between said contmuous tubular member and said perforated member, a valve pivotally mounted in said housing member, and means for operating said valve, the operation'of said valve tending to permit equalization of the pressure in said continuous tubularm'ember and said perforated member. y

3. In a muffler connected with an engine having a throttle control means, the combination of an outer member having an inlet and an outlet, a housing located in said outer member, said housing having a main port t0- 4 l 1,seo,eea

gether with a plurality of smaller ports, said housing being further rovded with ejector means 1n alignment with the main port of said housing, a valve pivotallj7 mounted in B the main port of said housing, a shaft for operating said valve, said shaft passing through said housing and said outer member, packin materiallaround said shaft, packing materia on the outside of said outer member, a mem-l 10 ber for compressin said vfirst mentioned packing around sai shaft, said last mentioned member further compressing said last. mentioned packing material against said outer shell, means for operating said shaft and said valve in conjunction with the throttle control means of the engine, a perforated member in Ialignment with the main port of said housing, louvered members between said l outer member and said perforated member, and ejector means in said outer member, said last mentioned ejector means being located between the ejector means of said housing and the outlet of said outer member.

4. In a muliier, the combination of a tubular member having an inlet and outlet, a

tubular member within said yfirst mentioned tubular member,a .plurality of disc members between said first mentioned and said second mentioned tubular members, said disc members bein provided with means' for causing gases to olloW a helical path, a valve member in said secondr mentioned tubular member, and a disc member provided with a discharge nozzle, said last mentioned disc member being suitably supported between said second mentioned tubular member and the l(leitlet of said first mentioned tubular memr. Dearborn, Mich., April 8th, 1929.

EMMET P.A GRAY. v 

